GTS meeting 7 23 18

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  • Measurements Conditions:
Gun = 200 kV
Laser rms = 0.436 mm
Gun Solenoid off
Anode bias = +1000 V
Upstream Ion Collector bias = -44 V
Downstream Ion Collector bias = -92 V (one electrode, second electrode is grounded)


  • Summary of lifetime measurements:
    • 10-min Sb Moly substrate photocathode lifetime: [1]
    • 90-min Sb GaAs substrate photocathode lifetime: [2]
    • 60-min Sb GaAs substrate photocathode lifetime: [3]
    • 30-min Sb GaAs substrate photocathode lifetime: [4]


  • Laser heating measurements:
    • 60-min Sb GaAs substrate photocathode heating
    • 30-min Sb GaAs substrate photocathode heating